Patent US2487783A successfully refreshed from Google Patents.
US2487783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic drive
Assignee: Rockwell Manufacturing Co
•
Filing: 1944-09-20
•
Granted: 1949-11-15
•
Expires: 1964-09-20
Abstract
No abstract record available.
Inventors
- 👤 William V Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:13
CPC Classifications
G; G01; G01F; G01F3/00; G01F3/02; G01F3/04; G01F3/06; G01F3/08; G01F15/00; G01F15/06; G01F15/065; G01F15/066; Y; Y10; Y10S; Y10S73/00; Y10S73/05
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US75313A
Cited
US1024741A
Cited
US1111684A
Cited
US1608231A
Cited
US1614530A
Cited
US1862267A
Cited
US1724873A
Cited
US1805021A
Cited
US1911960A
Cited
US1911099A
Cited
DE624654C
Cited
US2233572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-14 | 1953-05-16 | 1953-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-14 | 1957-05-16 | 1957-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-14 | 1961-05-16 | 1961-11-15 | $7700.00 | Window Closed / Lapsed |